Observers of this video don’t have clue what is happening. It is tricky to be sure. My first reaction was that this is a barn cat who has been friendly with horses at a dressage center and has learned by observation to copy the dressage extended trot.
Now that sounds farfetched. It might be but cats do learn by obeservation. Cats are very acute observers and quite smart when it comes to picking up what they see. One thing we don’t know is if this cat has this gait a lot of the time or whether it just happened on that stretch of decking. It would help to know.
The cat looks healthy. I don’t see anything wrong with this cute cat in terms of anatomy et cetera which might explain her strange extended dressage trot.
Someone suggested the decking on which she is walking causes the gait. That might be true but what is it about the planking that makes her do this? Perhaps it is very hot. I don’t get that argument because wood does not get that hot. It is a good insulator. If it was stone then it would be more plausible.